Grease cup



Dec. 15, 1931. o. v. SCHAUER ET AL 1,836,042

GREASE CUP Filed Feb. 27, 1930 INVENTOR S MMz SjAMZ/L 75 m wm Patented Dec. 15, 1931 PATEN'I'; OFFICE OLIVER V. SGHAUER, OF WEST amass our Application filed February 2'1, 1980. Serial No. 431,820.

In the accompanying drawings Fig. I is a view in vertical and axial section of agreasecup built in embodiment of my invention; Fig. II is a view in plan from beneath of a certain valve body included in the structure shown in Fig. I.

-The grease-cup is so far of familiar and standard structure as to include a cylindrical chamber 1 in which a. piston 2 reciprocates. The piston is backed by a spring ,3. Grease is supplied to the chamber 1 through a supply pipe 4 and is delivered from the chamber to the parts to be lubricated through a delivery pipe 5. Valve mechanism of one sort or another is commonly provided to control supply and delivery, to the end that grease may reach the parts to be lubricated at a properly 'dinally perforate,

controlled rate of flow. We use the term grease, and mean to include lubricating substances of the general character known as ease, whatever be their relative degree of uidity or viscosity.

The typical grease-cup so constituted is, in the practice of this invention, particularly elaborated in the following particulars.

The cylindrical cup 1 delivery end provided with a coaxially arranged cylindrical extension 6. Through the sidewall of this extension the supply pipe 4 is carried, and through the head of this extension remote from the cup the delivery pipe 5 leads. Within this extension a longitucylindrical valve body 7 is reciprocable. Within the range of its reciprocation the valve body 7 a ternately cuts off communication from the supply pipe 4 to the cup, and from the cup to the delivery pipe 5.

The cutting-off of communication from the cup to the delivery piple is, however, not a complete cutting-oil. ven when the valve is in the delivery-closing position shown in Fig. I, a b -pass of reduced size remains open; and this provision the structure when in service is relieved of excessive acciis at its supply and dental strain. The cylindrical valve body 7 is perforated at points remote from its axis, as clearly appears at 8 in Fig. II; and it bears on its outer head a central boss 9. This central boss, abutting upon the end wall of extension 6, effects closure of the main passageway 10, which leads to delivery pipe 5. There remains, however, a by-pass 11, of smaller size, which leads from extension 6 at a point in its end wall remote from the axis, and to this by-pass grease passin through the perforations in valve body 7 a ways has access, even when the valve is in the deliveryclosing position shown in Fig. virtue of the fact that the boss 9, abutting upon the end wall of the extension, brings the valve body to rest with the outer ends of its perforations 8 remote by a small but sufficient space from the end wall of the exten- SlOIl.

The by-pass, mentioned above, is advantageous if the cup is to be filled from a handoperated gun. If the filling be from a source of constant pressure, the by-pass will ordinarily not be provided.

The valve body 7 is so connected to the piston 2 in the grease-cup that, as the piston in its movement approaches the opposite limits of its range, it effects the shifting of the valve. The descending piston, as seen in Fig. I; by abutment upon valve body 7, drives it from supply cut-off position to de livery cut-ofi position. Such abutment is cushioned by the interposed spring 12, to the end that pressure shall increase gradually to a magnitude such as to effect the shifting of the valve. The ascending piston, by abutment upon a block 13, adjustable upon a stem 14 with which the valve body 7 is equipped, effects in its further rise the shifting of the Valve from delivery cut-off position to supply cut-0E position.

A spring-backed ball 15 is shown, set in the wall of extension 6, and the valve body is grooved circumferentially at 71 and .72, and co-operation of the ball with the grooves effects a spring-latch, yielding under sufiicient pressure, but tending to hold the valve body precisely in one or the other of its two alternating positions of closure.

VIEW, AND ARTHUR G. DAEIIENZBAGH, OF BEAVER, PENNSYLVANIA I: this by The piston 2 is provided with a stem 21A chamber and adapted to be shifted by the j which extends through an orifice formed in the remote and removable head 17 of the cup, and this stem 21 constitutes a centering rod for the coiled spring 3. The stem 21 is 1101- low, and is in open communication with the space within the cup and beneath the piston. Within this hollow stem 21 the stem 14 of the valve body 7 extends, and within this hollow stem 21 the adjustable block 13 upon stem 14 is arranged. The stem 21 is provided with a collar 22 and it is screw-threaded in a cup 23, and between the collar and the rim of the cup the usual plates with an interposed disk of flexible material which makes up such a piston are clamped. It will be perceived, on considering Fig. I, that by the removal first of cap 17 and then of spring 3 and stem 21, the block 13 is accessible for adjustment, without other disturbance of the assembly.

The effective size of the orifice of delivery is made adjustable by means of the adjustable valve 16.

In operation, the parts being in the positions shown in Fig. I, it may be understood that all the chambers and passageways-beneath piston 2 are full of grease. To this position the moving parts have come under the tension of spring 3. When then grease is caused to flow through intake pipe 4. under pressure suflieient to overcome the tension of spring 3 (and such pressure. may be imparted in known manner, bya pump, or otherwise), piston 2 will be driven upward. s the rising piston approaches the upper limit of its range it will engage the abutment 13 on the stem of valve body 7 and in its further rise will shift the valve body from the position shown upward, until at length the valve body will cut off communication from supply pipe 4 to the cup. Thereupon, the upward-driving pressure being relieved, and, the line of delivery being open, the tension of spring 3 will be. effective to drive the piston downward again. As the descending piston approaches the limit of its downward stroke, abutment upon valve body 7 (through spring 12) will cause the valve body 7 to descend with the piston, until the parts come again to the positions shown in Fig. I. The descent of the piston will effect delivery of grease at the desired gentle rate of flow.

It will be perceived that the moving parts are in no position unyieldingly opposed to pressure exerted upon the fluid grease, but that in every case there is relief, either by spring backing or by porting; and from this it follows that the parts are not liable to strains such as to cause breakage.

We claim as our invention:

1. In a grease-cup, a chamber provided at one end with supply and delivery ports, a pressure plate reciprocable within said chamher and tending to move toward the so ported end thereof, and a valve arranged within the said pressure plate in its reciprocation and effective within the range of such shifting to close in alternation the said ports.

2. In a grease-cup, a chamber provided at one end with supply and delivery ports, a pressure plate reciprocable within said chamber and tending to move toward the so ported end thereof, and a valve arranged Within the chamber and adapted to be engaged by the said pressure plate as the pressure plate approaches the opposite limits of its range of reciprocation, and to be shifted by the said pressure plate from one to the other of its alternate positions of closure of the said supply and delivery ports.

3. A grease-cup consisting of a cylindrical chambered body and a cylindrical axially arranged extension, supply and delivery ports leading to and from such extension, a reciprocable piston arranged in said cylindrical body and a reciprocable valve arranged in said extension, said piston being-subject in the course of operation to the opposed forces of spring tension and of hydrostatic pressure of supplied grease, and the valve being reciprocable in response to piston reciprocation between opposite positions of closure of the supply and of the delivery ports severally.

4. A ease-cup consisting of a cylindrical chambered body and a cylindrical and axially arranged extension thereof, a grease-supply port in the side-wall of said extension, a grease-delivery pipe port in the head of said extension, a piston reciprocable in said cylindrical body, a spring tending to shift the piston in a direction toward said extension, and a valve arranged in said extension and reciprocable therein between positions of closure upon said supply and delivery ports alternately, the said valve being movable by and in response to movement of said piston as the piston approaches the limits of its range of reciprocation.

5. The structure of claim 4, the said valve being longitudinally perforate.

6. A grease-cup consisting of a chambered body provided with anextension, a greasesupply port in the side wall of such extension, a plurality of spaced-apart grease-delivery ports in the head of such extension, a pressure plate reciprocable in said chambered body, a valve arranged in said extension and reciprocable therein between positions of closure upon said supply port and upon one of said delivery ports, alternately, the said valve being movable by and in response to movement of the said pressure plate, as the pressure plate approaches the limits of its range of reciprocation.

7. The structure of claim 6, the said valve being longitudinally perforate, and the perforation being so arranged that at all times chambered body to one at least of the delivery ports.

8. A grease-cup consisting of a cylindrical chambered body and a cylindrical and axially aligned extension thereof, a supply port and a delivery port opening through the walls of said extension, a valve reciprocable in said extension between positions of closure upon said ports in alternation, a piston reciprocable in said chambered body, a hollow stem borne by said piston, the space within the stem being open to the chamber on the side toward said extension, the said valve being provided with a stem extending when the parts are assembled within the said hollow piston stem, an abutment borne by said valve stem, the parts being so arranged and proportioned that the piston in its reciprocation in a direction away from said extension engages said abutment and shifts said valve from delivery-port closing position to su ply-port closin position.

n testimony w ereof we have hereunto set our hands.

OLIVER V. SCHAUER.

ARTHUR G.- DAELLENBACH. 

